Fix prompt test for Python 3.

IPython/core/tests/test_prompts.py

@@ -49,7 +49,7 b' class PromptTests(unittest.TestCase):'
         self.pm.color_scheme = 'NoColor'
         self.pm.in_template = "In [{int}]"
         prompt = self.pm.render('in')
-        self.assertEquals(prompt, u"In [<type 'int'>]")
+        self.assertEquals(prompt, u"In [%r]" % int)
 
     def test_undefined(self):
         self.pm.color_scheme = 'NoColor'